simplify-rtx.c (simplify_immed_subreg): Correctly extract the high word of an…

simplify-rtx.c (simplify_immed_subreg): Correctly extract the high word of an integral CONST_DOUBLE.

* simplify-rtx.c (simplify_immed_subreg): Correctly extract the
high word of an integral CONST_DOUBLE.

From-SVN: r75725

gcc/ChangeLog

+2004-01-12  Richard Earnshaw  <rearnsha@arm.com>
+
+	* simplify-rtx.c (simplify_immed_subreg): Correctly extract the
+	high word of an integral CONST_DOUBLE.
+
 2004-01-09  Paul Brook  <paul@codesourcery.com>
 
 	* simplify-rtx.c (simplify_plus_minus): Always generate canonical form.

gcc/simplify-rtx.c

@@ -3041,7 +3041,8 @@ simplify_immed_subreg (enum machine_mode outermode, rtx op,
 		*vp++ = CONST_DOUBLE_LOW (el) >> i;
 	      while (i < HOST_BITS_PER_WIDE_INT * 2 && i < elem_bitsize)
 		{
-		  *vp++ = CONST_DOUBLE_HIGH (el) >> i;
+		  *vp++
+		    = CONST_DOUBLE_HIGH (el) >> (i - HOST_BITS_PER_WIDE_INT);
 		  i += value_bit;
 		}
 	      /* It shouldn't matter what's done here, so fill it with